汽车乘员舱安全性与舒适性多学科设计优化

概念设计阶段汽车乘员舱的安全性和舒适性设计是关键任务,两者具有耦合效应,将多学科设计优化运用到乘员舱的设计中实现两个学科的并行设计。针对某款车的乘员舱布置,在该车100%正面碰撞试验基础上,通过乘员损伤分析软件建立该车的正面碰撞乘员约束系统模型并对模型进行验证用于评估其安全性;同时也基于关节强度的概念建立乘员舒适性模型。将多学科设计优化运用到乘员舱的设计中,避免了传统设计方法对安全性和舒适性的单独优化,实现了两个学科的并行设计,缩短了开发周期,最大化了乘员舱的整体性能。为提高计算效率,通过试验设计构建乘员约束系统的Kriging近似模型用于代替仿真模型。结果表明,该方法在较好地满足乘员安全性的同时提高了乘员的乘坐舒适性,在乘员舱布置方面具有较强的工程实用性。

Multidisciplinary Design Optimization of Passenger Compartment Safety and Comfort

The vehicle safety and comfort design of passenger compartment is the key task at early conceptual design stage.Both are coupling.The multidisciplinary design optimization(MDO) is applied to the design of passenger compartment to realize the two disciplines designed in parallel.Aiming at the passenger compartment layout of new models,based on the frontal crash test,modeling the occupant restraint system of a van using occupant injury analysis software and validating it to evaluate the vehicle safety;but also based on the concept of joint strength to establish the model of passenger comfort.The multidisciplinary design optimization was applied to the design of passenger compartment,avoiding optimizing safety and comfort separately using the traditional design method.This method achieves the design of the two disciplines in parallel,to shorten the development cycle,to maximize the overall performance of the passenger compartment.In order to improve efficiency,Kriging approximation model of the occupant restraint system is built to instead of simulation model through the design of experiments.The results showed that: the method make the passenger compartment meet the safety performance well and improve ride comfort,which has a strong engineering practicability in the layout of passenger compartment.